Noise on Startup Due to Failing Timing Chain Tensioner on Hyundai Azera

Problem Description and Possible Solution

If you experience excessive engine noise on startup (after the engine has been turned off for several hours) that lasts for more than five or six seconds, turn off the engine and check that the engine oil level is correct. If the oil level is correct, the noise may be caused by the timing chain tensioner. Hyundai has an improved tensioner to correct this problem.

Problem Data
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Average mileage: 53,971 (4,000–204,000)
8 model years affected: 2006, 2007, 2008, 2009, more2010, 2012, 2013, 2014
37 people reported this problem
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Viewing 1 - 20 of 27 comments
Loud valve noise at start-up. Hyundai regional representative deemed normal. If this was normal, the noise would have been present when the car was test driven. I test drove the car twice, no such noise. I will never recommend or buy Hyundai again!
Engine makes a loud clattering noise at start-up. Hyundai refuses to correct the noise.
I have a clattering noise at cold or hot start after letting the car sit for 5-10 min. Dealer told me it was normal to hear this, frustrating. I will make another appointment to address this but maybe at a different dealership?
knocking noise upon start up. Goes away quickly. Sounds like an old diesel.
Tapping sound on startup. Noise gradually goes away in 30 to 45 seconds of driving. Timing chain tensioner was replaced at 34212 miles. Repairs seemed to fix problem. Then after 500 miles tapping sound has come back. Problem not fixed, in fact as I type this my Azera is sitting in dealership garage. Dealership now says they will not fix it clamming the sound is normal. Can you believe that?
I've had the same problem. The car was brought into the dealership back in 2011 and they said they "couldn't replicate the sound" which was a flat out lie as I stood there listening to the knock upon start up. Needless to say, it was almost out of warranty and they didn't want to deal with it. Somehow, an upper control arm snapped on the car as well after the car was out of warranty -- I filed a report with the DOT. Hyundai didn't care one bit since nobody was hurt. The entire control arm was $40 with a ball joint (installed myself). I will NEVER go near this car company again. Too many bad experiences.
Loud clattering noise at cold start up for about 5 seconds
Knocking slapping sound at startup for about 3 seconds. Very noticable but after 3 seconds noise is gone till car is shut off and sits for about a few hours. Oil is new and filter.
i had the chain tensioner rep;aced at 77000 miles it makes more noise that the old one.The chin guides broke the dealer replaced guides and tensioner i now have 123000 miles on it when i start it it makes noise for 5min or more when i drive it.i have to let it idle or a while so i dont hear the noise/
loud noise, sounds like a belt sliping at start up. gets quiter as you drive but you still can when you excelarate.
The car has now been in the Hyundai dealer for 3 days. They are replacing parts for the front timing chain. They are also checking the back chain for the same problem. Hoping this fixes the problem.
Upon start up a rattling sound occurs for about 5 seconds then stops. Occurs when engine has not ran for an hour or more. Brought to dealer and the timing tensioner was replaced and rattle still occured. Dealer is now in contact with Hyundai engineers for what to do now.
That whining noise on startup is the surpentine belt idler pulley, not the timing chain pulley. Pully cost about $20 but difficult to get at the spring loaded pulley to remove the belt. Mine's going in the garage this week to replace.
I started car this morning loud knocking sound, after few minutes noise goes away, waiting to let car sit a few hours and start it again to see if I get same issue, making appointment with dealer ASAP
Rattling noise at startup. I happened to notice it while starting it in the garage. I have taken it to the dealer now 5 times and have been told the same thing "it is normal". I had a district manager from Hyundai come out and he to said the same thing. It seems to be worse the warmer the weather is. It lasts for about 1-3 seconds then seems to run fine afterwards. This is my 5th Hyundai and I have never had a problem before now. Maybe this will be my last...
Loud noise at start up. Sounds like bad lifter or timing chain slack. Dealer says it's normal (B.S.)
I now have 75000 The tensioner was replaced last year. Didn't resolve the problem I am still being told it is normal. Asked a regional rep to come to the local dealership. Of course, he told me the same thing. Recently had rough start up diagnosed as fuel injectors. While waiting for the parts to come in my engine started tapping all the time. Sounds like valves. Injectors have been replaced but still dissatisfied with tapping noise. Normal as per dealership. It is embarrassing to drive a nice car with such a loud engine. I love the car and the ride. I will never own another one due to the run around I get from the dealer. Every technician I have talked to other than the ones at Hyundai tell me the noise is not normal. I have been in the automotive business for years and this problem should have been taken care of a long time ago.
it's sound like a bearing that has no oil.
Purshased azera in august 2015. Two days later noticed the noise when starting the vehicle. The hyundai dealer had the vehicle for five days. Tensioner was changed but i still have the noise and also now leaking antifreeze. Have an appointment tomoro w/ another dealer to see if the antifreeze leak can be fixed.
Clicking noise at start up. Dealer said normal.... Does it affect the engine?